Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jan Kolar, Premysl Kubista, Frantisek VintnerfiledCriticalJan Kolar
Priority to CS487776ApriorityCriticalpatent/CS180544B1/cs
Publication of CS180544B1publicationCriticalpatent/CS180544B1/cs